Titanium Nitride Coated High Speed Steel Step Drill Bit Set 3 Pc

3 piece set of titanium nitride coated, high speed steel bits replaces 28 individual drill bits. That means you don’t have to constantly change bits when drilling the range of holes necessary on a countertop, for instance, so you can speed-up installation of kitchen/bath fixtures.

I used this to do the scary job of enlarging the endpin hole in a brand new acoustic guitar to install a 1/4 inch jack for a pickup. The step drill made a smooth pro looking cut and the installation went great. Way cheaper than the "Big Box" retailer version and it worked great.

I have used these with a drill press to drill holes in 1/4 inch steel. It is possible to dull them if you are not careful, but compared to using a set and switching to an ever larger drill these are really a time saver! For this price they are an absolute steel!

I bought a set of these and use them all the time. They are still as sharp as when I bought them. The only time I had an issue was about halfway through drilling 32 1/2" holes in 1/2" steel plate. The shaft came out of one of the bits. Considering I was heavily abusing the bit at the time I can understand. I bought another set (lost the second and broke the third hammering on it, not an intended use). I just drilled a 6" long 3/4" hole in aluminum with the new set and it worked great. I know you aren't supposed to drill more than the step depth but these take a lot of abuse. I love the fact that the holes are perfectly round. I've used these bits to drill holes marked with a transfer punch and the bits don't wander at all starting the hole. I've drilled flanges with eight 3/8" holes and had them line up with every stud within thousandths of an inch.

I was reluctant to buy these because of a very bad review I read but thought why not, Harbor freight excepts returns. They do exactly what it states they do. Make a good clean hole in metal. Would definatly recomend these.

My understanding of this type bit is it was intended for non-stainless steel sheetmetal. And for this it works great, self centering, clean cutting, and durable. Priced so that I have a couple sets around, I respect their limitations. I discovered these when trying to drill a large number of 5/8" diameter holes in a fairly heavy gauge sheetmetal. A standard twist drill would inevitably snag and break. This type of bit won't snag, and is quite durable.

I've broken one of them, the small tip seemed ideal to drill out a pop rivet with the steel puller still stuck in the aluminum - bad idea. Another job required drilling a hole in a stainless electrical box, it did the trick, but pretty much ruined the bit. For the cost of the bit, it was disposable and earned its retirement.

Don't believe me? Compare the price of this bit with a name brand, then try them side by side. I'm not seeing any difference in either longevity or ability to drill holes.

I own a custom motorcycle shop. I used these bits from Harbor Freight for the last 5 years. They used to come in a little blue fabric case. I loved these bits til just recently. For the last couple years, my shop would use twos sets a month. I loved them very much. It seems that they have changed manufacturers. They just come in a plastic display case now. Ever since this has changed, it seems that the quality has changed to the worst. I just bought two of these packages. The fist case was fine til I got to 5/8 and it just started smoking. I noticed that that step wasnt even sharp. I took out the larger bit from the other bit. It went fine til I hit the last step (3/4") and once again, instant smoke. Yep, that step wasnt sharp at all. Once again, Ive been doing fabrication work my entire life, it is not like I dont know how to properly use a bit and a press. To sum it up, If you want to drill through plastic a couple times, go for it. IF you want them for sheetmetal, I would suggest buying a brand name bit now. Really is a shame, they used to be so great. Ohh,,, this is my 4th package of bits Ive had bad luck with since they have change packaging/manufactures.

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